install aspell-en to fix build failures

Author: ashkulz

.github/workflows/checks.yml

@@ -18,5 +18,7 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
+    - name: install en dictionaries
+      run: sudo apt-get install -y aspell-en
     - name: rake spec
       run: bundle exec rake spec